Corporate pilot reported ATC questioned the crew on the clearance during climb on the sjc LOUPE4 dep...

Attributes
ACN	1568311
Time
Date	201808
Local Time Of Day	1201-1800
Place
Locale Reference	SJC.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Transport
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	SID LOUPE4
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

We picked up an IFR clearance for a part 91 flight from ksjc to ZZZ. We were issued a clearance to ZZZ; the clearance was read back to sjc clearance; 'aircraft X cleared to ZZZ via the LOUPE4 departure except right turn direct bmrng....' we departed runway 30L flew heading 306 to the 1.8 DME fix; as we were in a right turn and climbing to 5000 feet when departure told us to turn right to heading of 120. Departure then queried us about the departure programmed in our FMS. Then they gave us another heading change to 140 and cleared us to 11;000 feet; then we were cleared direct to sjc VOR. The rest of the flight was uneventful. In reviewing the event with the other pilot it appeared to us that this is common occurrence on this SID; and departure would like documentation on this SID procedure either to change it or doing away with this SID.

Original NASA ASRS Text

Title: Corporate pilot reported ATC questioned the crew on the clearance during climb on the SJC LOUPE4 departure.

Narrative: We picked up an IFR clearance for a Part 91 flight from KSJC to ZZZ. We were issued a clearance to ZZZ; the clearance was read back to SJC clearance; 'Aircraft X cleared to ZZZ via the LOUPE4 departure except right turn direct BMRNG....' We departed Runway 30L flew heading 306 to the 1.8 DME fix; as we were in a right turn and climbing to 5000 feet when departure told us to turn right to heading of 120. Departure then queried us about the departure programmed in our FMS. Then they gave us another heading change to 140 and cleared us to 11;000 feet; then we were cleared direct to SJC VOR. The rest of the flight was uneventful. In reviewing the event with the other pilot it appeared to us that this is common occurrence on this SID; and departure would like documentation on this SID procedure either to change it or doing away with this SID.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Corporate pilot reported ATC questioned the crew on the clearance during climb on the sjc LOUPE4 departure.